Genetic contamination may have serious impacts on biodiversity in the natural world.

My grandfather is being seen by a specialist in geriatric medicine.

He was forced to quit sports for medical reasons.

He is an excellent medical student.

She is studying traditional Chinese medicine and is utilizing that knowledge.

He is an expert in psychiatry.

My brother is a graduate student at the University of Tokyo.

He is a world-renowned researcher.

My laboratory is on the third floor of the university.

He is known as an excellent researcher.